What do I have to consider when selling my Nintendo 2DS?

So I would like to sell my Nintendo 2DS, but I do not know what to look for.

I would put the DS back before selling but I do not know if that's enough.

I also bought the DS in the package together with Mario Kart 7. Would the game still be there after the reset?

On the subject of games: I bought 3 games in the Nintendo e-shop. Will these games remove themselves if I log out of the Nintendo account on the DS and in the e-shop?

And if I would buy a new DS and log in there with my Nintendo account on the device, as well as in the e-shop, then I can download the games I had already bought quite normally and continue to play?

At that time I only had a normal Nintendo DS with Mario Kart

But I suspect that if you sign up from the account the games are not there anymore.

After the reset you can download the game again via the eshop.

Somewhere under Settings in the eshop there's the menu item. "Download Eworbene title again".

Since the buyer needs but I think your ID.

One time I read: "You can just download the game on the Bundle 2DS, without having to have a NID at all."

You can probably download it again. You can risk it, and try it.